Don’t know what I didn’t discover this before, I knew that Kubernetes namespaces were logically being used to encapsulate all the different components of a specific system, but I did not realize that deleting a namespace cascades the delete to everything in it. This is huge (and dangerous). It means that anything you put into Kubernetes should really always have a namespace associated with it so you can add and remove stuff in your thing just by using the namespace.
Although I haven’t done this yet, I could easily see leaving off the namespace when just constructing multi-object applications. This is why Helm, in spite of its quirks, is a thing that people use.